Abstract: The claimed invention is an ornithopter with three improvements over previous designs. First, it has a more efficient wing. Instead of using a heavy bracing rod to regulate the flexibility of the wing, it uses a lightweight cable tension system. Second, it has a steering mechanism that separates the servos from the tail itself, reducing the likelihood of damage in the event of a crash. Third, the ornithopter has a modular design, which allows more control over the external appearance of the model. Various bodies can be used with the same drive mechanism, and it permits the individual hobbyist or the kit manufacturer to produce additional body designs without having to take on the complex task of designing a new flapping mechanism.